Correction
I think that you are misunderstanding me. I have no problems with obtaining this IC. I’d like to repair a defect TV. It has no sound. The audio IF output pin of the IC is 29. I can’t measure FM signal on this pin, only noise. Therefore I’d like to measure the signals around the chip. I hope that the chip does not cause the fault. Tu understanding, how is it works (exactly), I need a datasheet of this chip. For want of the datasheet I’d like to get any schematic of the TV IF module, which is built with this chip. In other words, I unwilling to change the chip, only if I will certain that the chip is faulty. (The TV was bought in Austria, more then 10 years ago. It can receive the all-sound systems: 5,5 MHz; 6 MHz; 6,5 MHz; 7,4 MHz. This is a multistandard TV.)